Paper-making machinery



March 24, 1931. H, KUTTER 1,797,291

PAPER MAKING I MACHINERY Filed Dec. 10. 1928 2 Sheet-Sheet l [N VENTOR A TTORN/i y:

March 24, 1931. H. L. KUTTER 1,797,291

PAPER MAK I NG MACHINERY Filed Dec. 10, 1928 2 Sheets-Sheet 2 IN VEN T 0R M 7200 A TTOICVE V 2 eral views Patented Mar. 24, 193 1 UNITED STATES PATENT OFFICE HERMAN I1. KUTTER, 0F HAMILTON, OHIO, A SSIGNOR TO THE BLACK-CLAWSON COM- IPANY, OF HAMILTON, OHIO, CORPORATION OF OHIO PAP R-Maxine MACHINERY Application filed December 10, 1928. Serial No. 325,040.

5 ing roll or cylinder.

One object of the invention is the provision, in paper making machinery. such as paper calendering machines or the like, of a doctor adjustably mounted so that the pressure of the doctor blade on the roll with which it engages may be varied as desired, a quickly operable member being provided for easily and quickly moving the doctor blade out of elfective engagement with the roll.

Other objects and advantages of the invention will be apparent from the following description and the accompanyin drawings.

In the drawings, in which li e characters of reference designate like parts in the sev- Fig. 1 is a side elevation of a paper calendering machine, part of the frame being removed for a clearer disclosure of the doctors;

Fig. 2 is a front elevation of an end of one of the doctors and its mounting;

or cleaning or scraping the surface of a .re-

volving roll such as a drying cylinder, press roll, calender roll or the like, the drawings disclosin the invention as applied to a paper calendermg machine having a series of calender rolls each of which is operatively associated with a doctor. As shown the calenderin machine embodies a frame side 10 at one si e of the machine, a similar frame side being provided in spaced relationship therewith at the other side of the machine. These frame sides rotatablysupport a series of calendering rolls or cylinders 12, 13 and 14 a suitable number of which are provided for elfective' calendering operation on the paper as it passes through the nips of the various rolls.

Associated with each of the calender rolls of the machine is a scraping and cleaning dey vice, commonly called a doctor. A doctor 16 cooperates with the lower r011 12 and similar Fig. 3 is a section on the line 3-3 of Fig.

doctors designated generally j 17 and 18 cooperate w1th the rolls 13 and 14 for cleaning the surfaces of the rolls and toprevent adherence of the paper or its lead strip to pro vide for the proper feeding of the paper side 10 to the opposite side, and is preferably mounted at its ends on the frame sides so that the effective pressure'of the doctor blade on the roll can be varied. As shown, the doctor comprises a main body portion 20, preferably in the form of a hollow pipe or tube of sufficlent rlgidity so that it will support the doctor blade 21 and hold the latter without sagging at the middle. The doctor blade-21 is preferably constructed of steel or the like and is made rather thin so that it has considerable flexibility and may thus conform to surface irregularities in the roll with which it cooperates. The doctor blade 21 is suitably clamp ed or otherwise attached to an extension part 22 which is fixed to the body portion 20 by suitable screws 23 or the like. The body portion 21 of the doctor is made comparatively rigid and heavy so that .it may adequately support the longdoctor blade, the doctor and the roll being usually many feet in length. This body portion is pivotally mounted for rotation about an axis spaced from its longitudinal axis in the embodiment of the invention herein disclosed so that the weight of the body portion is effective to press the doctor blade against the roll with sufficient force for effective scraping operation without requiring the use. of additional pressure weights or springs, ordinarily employed.

Provided on the inner side of each frame side 10 is a doctor mount designated generally 25, and having a boss or circular flange 26 in alignment with the end of the doctor body 20 and closely adjacent this end. On the boss 26 is adjustably fixed a member 28, shown in the form of a clamp member having a split side provided with spaced lugs which maybedrawn together by a bolt 31 to firmly fix the clamp member in position on 1 9 9058, An thfil similar clamp member 32 is held firmly in position on the end of. the body portion of the doctor by a bolt 33 which may be tightened to draw the spaced lug ends of this member towards one another and causeit to securely grip the end of the doctor body. The two-clamp members 28 and 32, which are normally in axial alignment, are interconnected by a pivot connection shown in the form of a stud 36 threaded in one of the clamp portions and rotatably mounted relatively to the other. The body portion of the doctor is thus mounted for pivotal movement about the axis of the stud 36, which is spaced from the longitudinal axis of the doctor bod and, as shown, lies outside of the doctor ody and to one side thereof so that the weight of the comparatively heavy body portion 20 is effective by gravitation pull to hold the doctor blade in efl'ective scraping position against the roll with which it cooperates. It will be understood that both ends of the doctor body 20 are similarly supported upon the two frame sides of the machine. As shown in Fig. 3, the doctor blade lies below the doctor body 20, the stud 36 being positioned above the doctor body and between the vertical planes containing the scraping edge of the plane and the center of the body portion '20 so that the weight of the doctor ody portion which tends to move clockwise as seen in this figure holds the doctor blade against the roll. As

the blade has considerable flexibility and conforms to irregularities in the surface of the roll, the use of loading weights or springs ordinarily employed to press the doctor blade against the roll is unnecessary.

The amount of pressure effective on the doctor blade may be readily varied as the clamp members 28 and 32 are adjustably fixed to the frame and to the doctor body respectively. Where increased pressure of the doctor blade against the roll is desired the two clamp bolts 31 and 33 are loosened and both clamps are adjusted about the center of the doctor body and the flange or boss 26 which is normally aligned therewith, the position of the stud 36 being adjusted toward the roll so as to increase the effective lever arm of the doctor body about this stud and cause an increased pressure of the doctor blade against the roll without causing any change in the axis of the doctor body relative to the supporting flange 26 or relative to the roll. K i

In calendering machines and the like it is frequently desirable that the doctor be withdrawn from effective scraping engagement with the rolls to increase the life of the doctor blades, when they are not needed, as

. when some of the calendering rolls of the to ,eifectively calender the paper, and as the others are not effective on the paper, the doctor blades for these extra rolls are hereln adapted to be readily withdrawn from effective scraping engagement with the rolls.

This movement 0 a doctor blade is accomplished, as shown, by a member such as the hand ever 38 pivoted preferably. on one of the supporting memlever 38 having a cam 41, the low side 42 of which is normally spaced a little distance from the head 43 of bolt 31. When the doctor blade is in effective scrapingposition the lever is positioned as shown in ig. 3 so that slight movements of the doctor about the stud 36 may obtain as the doctor blade follows the irregularities of the roll. The cam 41 has a high side 44 which engages the bolt head 43 when the lever 38 is moved clockwlse from the position shown in Fig. 3 through about 180 .travel. This raises the shaft 39 on which the lever is pivoted since the bolt head 43 is fixed relatively to the flange 26, thus raising the doctor about the stud 36 out of effective scraping relation with the roll. The raised portion 44 of the cam is so arranged that the lever remains 1n. the position to which it is turned until manually operated to chan e the position of the doctor. It will be .un erstood that a similar raislng device is provided at each end of a doctor so that the various doctors may be very easily and quickly moved to inefiective positions, each doctor being individually controlled so that those which are not needed in any particular calendering operation may be moved to inefi'ective positions.

In order to properly position the doctors on the frame so that they are properly located relatively to the rolls with which they cooperate, each doctor support preferably comprises a series of slides and slide members which may be adjusted relatively to the roll and clamped in their proper positions. As shown a slide member 48 is fixed to the frame support 10 by means of bolts 49 threaded in the support. This slide member 48 cooperates with a slide block 50 which may slide along the face 51 and the side edges of the slide member 48, the slide block 50 having side portions 52 against which abut the ends of screws 53 threaded in a cross plate 54 which is adjustably clamped to the slide member 48 by means of a bolt 55 the'shank of which extends through a longitudinal slot 56 in the member 48. turned equal amounts so as to be moved axially relatively to the plate 54 for raising or lowering the slide block 50. The slide block forms a guide for a horizontally movable quickly operable The screws 53 may be slide 57 which slides along the face-58 and the side edges thereof. .The slide 57 may be clamped in proper position by clamp bolts 60 extending through slots 61 in the slide 57 and slots 62 in slide member 48, the slots 62 and 61 being preferably arranged at 90 from one another so that rectilinear movements in both horizontally and vertical directions are provided for. The slide 57 is preferably integrallyprovided with the boss or flange 26 to which the clamp 28 is fixed,

the doctor thus being mounted so that it mayscribed constitutes a preferred .embodiment of the invention, it isto be understood that the invention is not limited to this precise form of apparatus, and that changes maybe made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is: 1. In paper making machinery of the class described, a roll, a doctor, a frame on which said doctor is pivoted adjacent said roll, a

'pair of pivotally interconnected supporting members one on said frame and oneon said I operable to quickly move said doctor on its -to be operated to 1 away from said rol doctor, and a lever fulcrumed on one of said members and engaging the other member and pivot out of engagement with said roll.

.2; In aper making machinery of the class describe a roll, a doctor including a flexible blade adapted to conform to irregularities in the roll, a supporting frame on which said doctor is mounted adjacent said roll so that the weight of the doctor is effective to normally maintain it in engagement with the roll, and a quickly'operable member adaptedquickly move said doctor ries of calender rolls, a frame on which said rolls are supported, a series of doctors for said rolls, sald doctors comprising trans verse body members and doctor blades supported thereon, and means comprising pivotally interconnected clamp members adjustably fixed to said body members and to said frame for pivotally mounting said doctors in an adjustable manner on said frame so that the Weight of a doctor is effective in holding the doctor blade in scraping relation witha roll, and a quickly operable device for each doctor pivoted on' one of said members and engaging the other member for moving and holding said doctor in inefi'ective position relatively to said roll.

5. In a paper making machine, a roll, a doctor having a blade adapted to cooperate with said roll, a bar on which said blade is fixed, adjustable means for mounting said doctor for rotational and rectilinear movement, so that the weight of the bar is efi'ective to hold the doctor in effective engagement with said roll, and means for quickly rotating said doctor to move it out of effective engagement with said roll.

6. In a paper making machine, a roll, a doctor having a blade adapted to cooperate with said roll, and a bar to which said blade is fixed, a frame, a slide member on said frame, a slide movable on said slide member and serving as a support for the doctor,

means forclamping said slide to said slide member in various positions of adjustment, a clamp member adjustably fixed to said bar, and a second similar clamp pivotally connected to said first clamp at a point removed fromthe axis of said bar and adjustably clamped to said slide.

In testimony whereof I hereto aflix my signature.

' HERMAN L. KUTTER.

3. In a paper calendering machine, a se ries of calender rolls and a series of doctorshaving flexible doctor blades adapted to conform to irregularities of the calender rolls, cooperating with said rolls, a frame, said doc tors bein pivotally supported on said frame so that't e weight of the doctors is effective to maintain the blades in effective engagement with said rolls, and means for quicklyand individually moving said doctors on their pivots to ineffective positions relatively to 1 said rolls. s

' 4. In a paper calendering machine, a se- 

